Spark Knock in my '59

["Steve B." <imperial59@xxxxxxxxxxxxxxx>]

>but the car has only 75,000 original miles.  Any
>suggestions about the cause?  BTW, my 60 and 61 Imperials have zero
spark
> knock....  Thanks in advance.

My first suggestion would be distributor.  It is possible that the
mechanical or vacuum advance are not working properly.  Secondly check
your timing chain for wear.

                    Steve B.